#include <cstdio>
#include<cstring>
#define P 73
#define m1 666013
#define m2 686969
#define MAXN 2000010
using namespace std;
char a[MAXN],b[MAXN];
int v[MAXN];
int i,p1,p2,na,nb,nr,ca1,cb1,ca2,cb2;
int main()
{
    freopen("strmatch.in","r",stdin);
    freopen("strmatch.out","w",stdout);
    gets(a);
    gets(b);
    na=strlen(a);
    nb=strlen(b);
    if(na>nb)
    {
        printf("0\n");
        return 0;
    }
    p1=p2=1;
    for(i=0;i<na;i++)
    {
        ca1=(c1*P+a[i])%m1;
        ca2=(c2*P+a[i])%m2;
        if(i!=0)
        {
            p1=(p1*P)%m1;
            p2=(p2*P)%m2;
        }
    }
    for(i=0;i<na;i++)
    {
        cb1=(cb1*P+b[i])%m1;
        cb2=(cb2*P+b[i])%m2;
    }
    if(cb1==ca1&&cb2==ca2)
    {
        v[0]=1;
        nr++;
    }
    for(i=na;i<nb;i++)
    {
        cb1=((cb1-(b[i-na]*p1)%m1+m1)*P+b[i])%m1;
        cb2=((cb2-(b[i-na]*p2)%m2+m2)*P+b[i])%m2;
        if(cb1==ca1&&cb2==ca2)
        {
            v[i-na+1]=1;
            nr++;
        }
    }
    printf("%d\n",nr);
    nr=0;
    nr=0;
    for(i=0;i<nb&&nr<1000;i++)
    if(v[i])
    {
        nr++;
        printf("%d ",i);
    }
    printf("\n");
    return 0;
}